Your pistol is essentially identical to the PA-63, differing only in the barrel. It was originally made as an American market version for import by Kassnar. Magazines and internal parts for the 63 will work.
Many FEG users find the double action trigger pull heavy, and the recoil sharp. These can both be solved by replacing springs. Wolff Gunsprings at www.gunsprings.com
has hammer springs and recoil springs in various weights that will take care of this problem. There are earlier threads that deal with the replacement process. I've done four of these now, and every user is amazed at the improvement in feel.
Other parts are available from Numrich at www.e-gunparts.com
or Buymilsurp at www.buymilsurp.com
The FEG is a derivative of the Walther PP, and while having several internal improvements, is still similar in size and shape. Holsters and magazine pouches listed for the Walther PP (and the SIG P230 and P232) will fit the FEG very well. I use a Bianchi size 9 holster, and a size 0 magazine pouch.
I'd like to have one myself. In the long run it's possible the .380 ACP will be more available. Right now 9x18 Makarov is cheaper and easier to find than .380. Almost all Makarov is imported, and could be stopped by a sweep of the pen. Some prefer the Makarov, as it's a bit more powerful. However, high end Makarov loads shouldn't be used in the PA-63 anyway. 95 grain standard loads, that are safe for the aluminum frame PA-63, are no more powerful than some .380 ACP on the market.
P.S. Take a look Marschalgips http://marschalgrips.com/
for beautiful wood grips. The extended grips come down parrallel with the floorplate extension of the magazine, and give a better grip for larger hands.