One of the best bets might just be to see what miltary wheels you have in your area that you can purchase without needing to get them shipped. I guess it all depends on your budget. A3 wheels are usually expensive and as shown by Gringeltaube, not the correct rim to use with 395s. Purchased pre-modified wheels can be expensive too (but not always), and they probably need to be shipped but I think there is an outfit in your region that does this?
-There are a couple companies that modify HEMTT, and FMTV rims by cutting out the centers and welding in new ones so you can essentially just buy a finished wheel.
-Or you can buy adapter plates. I make/sell MRAP adapter plates that just bolt right on and require no additional work. There are many variations of the MRAP wheel but basically they all have 10 lug holes and a large 11" center hole.
-I've also got a new bolt on adapter plate coming out soon that will fit a couple different common wheels. It fits the FMTV wheels, and both versions of the 5 ton combat rims. (these rims are probably the least expensive / easiest to find wheels out there at the moment). The FMTV rims have 20 beadlock studs, and a 10 lug holes with an 8-3/4" center hole. The 5 Ton Combat rims have 10 beadlock studs, and a 10 lug holes with an 8-3/4" center hole. There are 2 versions of the 5 ton combat rim, they look the same but have different size beadlock studs on a slightly different diameter.