Don't know which model you are considering so it is hard to answer.
I have a P12-45 and recently picked up a Warthog.
The P12 I bought used, in part because the guy I bought it from said it wouldn't go three round without jamming. He was right. I replaced the recoil spring and the mag springs and it has been 100 percent since. It is very accurate.
The Warthog was a surprise. I've recently finished the 300-round break-in period Para recommends without a hiccup. In the process I thought I'd found the ammo I want to carry for self defense. I went to the range this afternoon to see if I would settle on this ammo. I fired four rounds from 10 yards. All four holes were touching and in the X-ring. The gun is ready for service.
Parts are not necessarily the same as 1911, but are widely available. Steel mag releases are available from numerous sources. Mainspring housings in arched and flat, stainless and blued, smooth or checkered, with or without a magwell and even with a lanyard loop are made by Smith & Alexander. They also make wood grips in checkered and smooth for all the double stack Paras (including the Warthog).
Wolff has Springs. Dawson Precision, EGW and PT all make sights.
I am not a fan of cast frames and slides or MIM parts, but my Paras are working guns and that means they will spend a lot more time in the holster than on the firing line.
I have other guns to shoot for practice, in competition or for barbecues.