I contacted Warco on Monday as suggested and explained me problem to Peter in the spares department. Although my model mill is obsolete the do still sell it's bigger brother. Peter spent some time looking through parts manuals and identified the part. He offered to dig the part out and measure it to see if it was identical, which it was apart from the bore which was 14mm where mine was 12mm. Part ordered and paid for and delivered this morning.
Set about hunting for some suitable tube to make a sleeve but nothing anywhere near. So set about drilling & boring some MS bar. Job done, now to fit it all together. Bugger, the new pinion is fractionally too wide. Put casting in the mill vice and Luckily my longest endmill was just long enough for me to skim the insides of the bearing arms. Job finally done and it works sweet as a nut.
Well done Peter at Warco; excellent service.
Went to do another job on the lathe and the bloody belt broke. Took the remnants of the belt to the local bearing supplier who offered to chase one up. He phoned me a couple of minutes ago, said he could source one at a price. I'm glad I was sitting down: £19 + VAT plus £12 + VAT carriage. What planet are these people on? £12 carriage for something that will fit in a Jiffy Bag. Just managed to source a belt on Amazon £16.26 inc delivery.
Rant over.
Iain