On my CrossBreed, I removed the stock clips and replaced them with these.
http://www.comp-tac.com/product_info.php?products_id=79
I ordered them on a Wednesday and had them on Monday I think. They will allow you to mount your clips lower on the holster, multiply your height and cant options and give you an inch or so more tuck...
Keep in mind that Comp-Tac sells them EACH not in pairs...you will need to buy two.