I dont now if they can be resleeved. Send a pic to a couple resleeving comanys. Like LA Sleeve or Northwestern or Northern Sleeve Company ( cant remeber the exact name). Resleeving isnt an economical choice, but I did it. Bought a set of Patriot Racing 4mill Drag Ported cylinders that needed resleeved due to a cracked sleeve. I sent them back to Dan at Patriot Racing and had Big Bore sleeves installed. Fist bore is 66mm and last bore is 68mm.
If your going to get them resleeved why not do a big bore sleeve and run just blaster pistons. Start out a 66mm. If you go any bigger than 66mm you need big bore domes for you cool head any way.