I think Dave has hit the nail on the head once again !
The price of ANYTHING is what someone is prepared to pay for it. Try buying bits for cars even a few years out of date. A friend of mine needed a headlamp for his 2006 Hi Ace van and found that they were not to be had for love or money, new or second hand, from Main Dealers or scrap yards. So, what chance machine spares ?
I suspect that this is something which will have to be made, not bought. Could be an interesting project, but costly in terms of time.
All depends on how much the machine is worth along with how bad the damage is, might be worth taking on as a labour-of-love, just for old times sake.
If the fence is the only problem, I,m sure something could be drummed up to suit, but if there are problems with other parts that might be a different matter.
Dave was right about metal suppliers, they cannot be bothered with small orders, not worth the trouble, living now out in the sticks,I know this only too well, but I dont blame them. I try to make a trip twice a year to pick up what I THINK I mignt need [sometimes I get it right !}, other times I just have to make-do.
It,s all about money, always was always will be .
Old makers are disappearing faster than snow on a hot roof so dont expect to find spare parts easy