Here's a trick for finding compatible parts.
When a company like Kingman makes a bunch of different variations of basically the same gun with different names they use most of the same parts over and over again. In the factory those parts have designated parts numbers. So there isn't a bin full of bolts labeled "bolt for Pilot, Electra, Aggressor...", instead it's a bin labeled "VBT008".
Find the manual for your gun...
Look through it until you see a parts number for the bolt, such as VBT008, then just do a quick google search for "Spyder bolt VBT008" and get plenty of places to buy one.
You can find out all kinds of nifty stuff doing this too, such as the JT Impulse regulator is essentially a GOG eXTCy reg with a Luxe reg spring in it.