H40 Coveralls Alternatives

Can you guys give some suggestions on cheaper alternative Coveralls for an H40 costume - I’m still growing and don’t want to spend what Workrite Coveralls usually cost. So please give me some alternatives, Thanks.

It would also be nice if you could tell me an artist that will convert the Coveralls to look more like the ones from H40. (Front Flap, weathering, etc.)

I’m just gonna use my charcoal red kaps as well

I haven’t sewed anything in a while, but I can try to add a flap.