I don't think you'll find a high volume geissele rebcg. And if you do, I think it'll be so rare that it'll practically be a one off case as oppose the norm. Here's my rationale behind it.
1) People who spend money into a bcg are probably the very people worried their weapon will break so they'll try to baby it and use parts they believe will prolong it even though they'll never achieve that hypothetical rate.
2) People who shoot a lot are probably constantly changing their weapon such that they have a basic platform but they'll concentrate more on being able to shoot more than they would of prolonging individual parts. Why spend 350 bucks on a rebcg, when you can spend 200 bucks on a bcg that'll last the entire barrel's life cycle? And the worst thing you'll have to change out is the bolt and maybe some parts.
3) People who are into sports like 3gun or whatnot, are usually sponsored by a specific company and they'll have to use their product for the duration of their competition. They might be able to bring their own weapon but generally speaking a company will want them to use as much as their products as they can. So they're not going to take out a sponsor's item, swap it with a part they think is better, and potentially lose their sponsorship once they find out especially if it causes a controversy where people think their product is less.
With that said, I do have a premium bcg myself. A LMT's enhanced bcg and I've been shooting 1000s of rounds through it so far. I estimate last year I shot about 4k rounds out of it. What I learn is that it gets easier to clean just like a rebcg because eventually you'll smooth out the roughness in the bcg that causes carbon and other things to stick.