Where can an old army vet get the new WWII style dress uniform?

You mean the pink and greens? Very readily available at clothing sales or at various suppliers online (Google with the terms Army pink greens)

Here you go, sir. https://www.marlowwhite.com/

MCSS or Marlow White

Clothing and sales or online at sites like USAMM or Marlow White

If you don't have access to any military base (in particular Army posts), you won't get access to Military Clothing Sales. If you have a retirement card, you can access the base and make your way to the clothing sales store and just order with the local staff.

Recommend contacting a local National Guard or Army Reserve person you might know (Via the VFW or American Legion or AMVETS...etc) to find a Soldier who has access to help you get and order a set. They are on display in most military clothing sales stores.

Should note, that PRICING is expensive and there will be no differences between any of the stores if you go shopping for a better price. Plus, it is still too early to find the uniform at any local USED MILITARY SURPLUS STORES.

Hope that helps
Bob S
CSM (R)