as said did you unscrew the bleed nipple?(just a little)
8mm IIRC
8mm IIRC
could pop down to a friendly garage see if they got one of them special piston pushing back tools
then I'd suspect that they're the calipers for a non-vented disk (which will be substantially narrower).
You could try selling them to make a bit of cash back as they are really nice now treated, perhaps someone wants a 1.6 disc conversion on there car? I'd try and get something back off the scrapyard, tell them as you've paid to have them remanufactured etc you want to keep them but want some 1.8's at a greatly reduced cost or free casue you'll need them remanufactered as well.
Worth a try!
And if they give you **** get on to trading standards!