hi,was this type of disc fitted to any other bikes,mine is a 1984.
just noticed mine is cracked in 3 separate places but cant find any for sale in the uk.
They come up for sale regularly on eBay. So you CAN find them.
All the Gold Wing GL1200s (1984, 1985, 1986, and 1987) use the same brake rotors.
But, there are two different types of rotors depending on the model of the Gold Wing. All the Interstate models (and the 1984 Standard model) use non-vented (solid) rotors. All the Aspencade models use vented rotors which are over twice as thick.
If you find some rotors, make sure they still have some life left in them. The service limit thickness for the Interstate rotors is 4mm. The service limit thickness for the Aspencade rotors is 9mm.
So, don't waste your money buying rotors that are under that thickness.
If the seller didn't advertise or won't measure the thickness for you with a micrometer or other similar tool, don't buy from them. Look for a seller that has measured the rotor thickness and put that info in their ad.
You should be able to find a set on eBay.
Good luck with it.