Okay great!! I won’t be looking for spending a lot on new irons yet then.
The best option seems to be as @Bonvivant wrote. Get fitted, get lie angle fixed on my current clubs as they are fine right now and be on the lookout for used clubs with right angles.
There is lie angle, but what is it more that they can change in my current clubs? Length and shaft?
Using only my home course over the years, I have No Albatross's, Eagled all par 5's, Eagled 3 times on par 3' (2 on same hole)
Eagled 4 different par 4's (12 times on my home hole #7) and all holes have been Birdied. (30 under par)
My chances of making an Albatross are slim, none and none, until I reach the ripe old age when I may play it forward...
Those Mizuno's are good sticks and can easily be modified to what you need most likely. Length and grip size will not change unless you decide down the road to go off book because of arthritis or injury etc. Swing speed will in theory go up with better technique and practice but usually not so much that you would need to totally change flexes. Lie angle might change but can always be adjusted. Mizuno's can usually be bent easily so you can adjust as needed.