Depending on the model you get it will hold either 350, 700, 1500 or 2100 balls.
The M350 is $34.00. WAY too expensive for 2.5 pods (140 rnd pods)of paint.
M700 is $59.00. Still way too expensive for for 5 pods...
the M2100 is $140 and that's about 15 pods. That makes sense for a big game since you can't really carry that many pods. But it's still cheaper to buy 14 Dye 160 rnd lock lid pods.
I personally can't see enough people buying these things to make a vest viable to the general market.
I'm sure MOATI could do a custom vest for you though.
Mind you having a vest in itself to hold the pods makes it at least even, no? The issue is bothering to mount it on a vest, it'd be better to have it BE the vest with MOLLE for optional extras.