This is indeed a revision of the old design..
Here is his page showing the old design

This new one is a lot better, as for clearance, ou will still gain some.. ( I think it is about 1"- 2" but you gain some serious protection now..

I am unsure when he is going to be putting them up for sale and I am also unsure of the cost.. That is up to him.. I do know that this design is a lot more work and will be more expensive than the old one.. But look at the old one, and then the new one and you can see how much better it is..
Here is BudBuilt's website.. Please give him a call for info on them..