Sleeves for a B20

Does anyone know where I can get a set of sleeves for B20? A guy came into the shop today asking about putting a thicker set of sleeves into his B20 so he can run more boost. I really need to know where to go to find these sleeves. I went to Darton but they dont make them for a B20 the closest thing they have in terms of bore size is the ones for a F22 . Will those work? Anyway I'd really appreciate any help in locating these sleeves as I am having no luck.

Try www.goldeneaglemfg.com .I would not buy sleeves if they are not Darton or Eagle. If they dont have them, they are probably not made. And is your customer aware (and you) that you can just drop a set of sleeves in your car and put the head back on and drive away. There is a serious amount of maching work involed to do it right, especially in a high rpm honda pushing boost.