Tasker B2 Back Axle Spring

[MG]

In search of a spring/springs that sit in/on the back axle compensation gear of a tasker b2 gear drive tractor (might be similar on chain drive??)

I'm trying to find drawings to put on here as well as pictures of the part needed but there are two of these springs in the arrangement and "we" have broken one so need to replace it or both asap, if anyone knows the where abouts of such an item or where a good place to get such a thing made please let me know (it's I believed classed as a square spring)