Check your local parts store for a kit. They probably have one in stock don't assume you have to order one over the internet or from a specialty house. Mine was less than 8 bucks (20 bucks with a hone). I believe the bore is 3/4".

If the outer boot is not bad, just get a generic wheel cylinder kit of the proper bore diameter. The seal is essentially the same. The bore will look like crap inside. I stuck the hone in there, poured a little brake fluid in to lube it up and and spun the hone in and out with my palms for about 3 to 5 seconds and the bore was fresh as can be. I may have left some minor details out but it is a simple fix.

Heck, I didn't even jack the car up!!! I did the whole sitting in the grass next to the car on our grassy driveway.