Miura operates a very exclusive dealer model. Essentially, one dealer per state (except California, which is always split in 2). This makes it very difficult for club fitters to market and sell the product. That's the first problem.
As an example, you're in NY - big state. Upper and 'City' are two totally different markets. Imagine now that you want to buy, but you're upstate and the only authorized dealer is in the City. That's really inconvenient. Most people aren't going to lay out $2-3k for a set of custom made clubs without actually demo'ing them first. If demo'ing requires driving 4-6 hours round trip, that's pretty unlikely. That's the second problem.
Sometimes smaller golf shops that have a smaller local presence have special arrangements with these singular 'statewide' dealers whereby they order direct from the single dealer at a small discount (5-15%). A lot of times the smaller stores will try to resell the clubs new. This is against Miura policy, and they actively monitor.
It is entirely possible that the small shops will sell sets that they don't have in stock, and they're banking on the fact that they can hold you off for 3-4 weeks while they put their order in through one of the state dealers, take shipment, build and deliver. That's risky. Head availability is based upon foundry orders and logistics can sometimes backlog a single head (like a 7 iron). Can't sell a set if one of the clubs is missing, or if you're waiting for a state dealer to be more efficient. FYI, a lot of these state dealers are very small shops - vry small. Additionally, think about the cash outlay on the money transfer. Small independent clubfitters and small resellers don't typically have 10's of thousands of dollars to float the Miura whacky supply chain.
Imo (and I'm probably a minority here), Miura has created exclusive territories that have the net effect of being in a lottery for a NYC taxi cab medallion.
Direct access to product is the name of the game, and (outside of CA), there simply aren't enough dealers within a reasonable distance to promote a 'one dealer per state' model. Maybe they don't get it. A state is a huge territory. Massively huge when your customers want to touch the product before they buy. There's no possible way I'm driving hundreds of miles to test drive a golf club - I don't care what it is.
Incidentally, Bridgestone has the same problem. I really wanted to buy a J40 430cc driver last year. Unfortunately, no one carries them locally. How do you justify spending $400 on a club sight unseen and without ever trying it? Not going to happen. so I bought a Titleist, like it just fine, but it's not what I wanted.
My feeling is that Miura has an opportunity to qualify its dealer network based upon smaller regional territories and sales volume.
I play Miura tournament blades. I wouldn't change to anything else unless I was signing an equipment endorsement contract that required it.
I would say that the easiest electronic outlet is everyone's favorite ecommerce site (-bay), and more often than not you can find used Miuras there. They're less expensive used, but still very expensive, and if you've never tried the clubs that won't solve your dilemma.
Hope that helps.