I have placed my online order for two rebuild kits from CARiD. $9.50 each to include delivering to my door. I ordered Centric 143.62031. The listing shows 4 pieces. The FS listing shows 5 pieces. I'm not sure what the pieces are. Obviously the boot and piston seal. I think the 2-way check valve and shaft seal are included. I think the FS kit includes the brake lever seal whereas the Centric kit does not. I've queried the FS about their kit's contents, but I have not received a response.
Are you replacing the sleeve boots? I've only found these on the FS site. Pricey, but the only game in town often is. I'm not in a hurry so I'm taking a wait and see attitude about replacing them.
What Are you doing about your pins? I also ordered CENTRIC® 117.62044 - Front Disc Brake Hardware Kit. $5.87 delivered. Not sure I'll use them, but I wanted to see these pins. They are not roll pins that get pressed in and out. I think these are slightly smaller in diameter and push right in. They appear to be held in place with hairpin cotter pins. If so, this'll make future brake serving much easier.
'88 Formula, red on gray