Manta 'a' Front Disc/calliper Information?

[Alf]

Hello Chaps,

I'm trying to get some new front disc brakes for my 1972 Manta 'A', so far I've bought three sets from various Ads on Ebay, each one coming back to me days later saying they're out of stock, it's been two weeks now and I still can't find any, mine are the 238mm diameter solid discs.

The slightly larger 246mm discs are readily available and will fit my hubs OK but will not clear my callipers, does anyone know if these are from the Manta 'B'? If so, could I get a pair of Manta 'B' callipers and would they fit to my 'A'?

I don't really want to go for bigger brakes, I like the standard set-up, it suits my use and I want to keep the standard wheels so any information would be appreciated!!

Thanks,

Alf.