Need a new bolt. Recommendations

[popgun]

I built my gun with an Aero BCG. Had the bolt matched to the barrel when it was chambered. I noticed a headspace change (.0015-.002") when measuring my fired brass. I started looking around and found the lugs on the back side of the bolt are a little worn and very lightly mushroomed.
 So I'm going to replace the bolt. Any suggestions. Are JP bolts worth the money? I would try a Monster but can't find one. Maxim?