Are the rubber boots at the ends ( firewall and caliper ) different?
I’m trying to locate a set for both ends of each cable,

Yes, they are different. The forward (firewall) ones come with the cables. The rearward (caliper) ones are from AA and 914 Rubber. Installing my rear ones tomorrow. A prior thread on this maybe two weeks ago. Tricky to get the boot over the cable clip onto the caliper hook.
Photos maybe tomorrow .

Yes they are, and I have a extra set. Bought from 914Rubber earlier this year, then I bought the full cable special last month which came with new boots also.
Pete

I can vouch for the 914 rubber boots. Slather a little Dawn dish soap on them, it's make installation much easier.
Rob

When you put the rubber boot over the clevis at the caliper use a blunted awl, slide it into the opening at the clevis side, as you push the clevis through the hole use the awl, being careful not to catch the tip on the boot, take the awl and spread the opening using the clevis for leverage, spin the awl around the clevis and the hole will open enough to push the clevis through the hole.
Works every time haven’t torn one yet done this about 10 times on my car in 40 years .

Here are the pics! On to the other side…
Click to view attachment
Click to view attachment
Click to view attachment
Click to view attachment

Very nice!

The right side. Done!
It looks (?) like there’s a slot for a wire stay around the bigger end.
Click to view attachment