old transalp / RDO4 tank

[datsun fan]

looking for a RD04 petrol tank and / or the older style transalp tank which supposedly fits straight on OR, any other fuel tanks go on an RDO4 frame without too much grief!, not sure which years it is relevant to the transalp, square headlamp version - I think.

Thanks

[MCsanandreas]

i thought all T/A tanks were the same? just the upper fairing that is different bodywork wise?
i have a tank from a '99 T/A if that would be any good to you?