Yes, the bushing is available, think it's a standard commercial one.
This is the one from the later pedals, i *think* it's the same one, but if you can measure whats left of it, you should be able to find longer/shorter bushes as required.
Apologies - my OP was from memory when I stripped it a few weeks ago- I meant to say can we still get the mud/dust collar - as you can see below the Far left item - I Hamfisted it and it broke when attempting to remove the bearing!!!
If not I dont think its a problem as there is another shield ( 2nd from left)
Photo has the parts in order that they came off
The bearing shaft on the axel is 12mm - any idea of the exact bearing size please - - if not I still have tjhe other pedal unstripped.