01E is 830mm total length, 0A3 is 856mm and 5HP24a is 958mm.
On second glance, the 0A3 does have mounting bosses on the side in roughly the same place as the 01E - they're just not used, so you could fabricate mounts to fit the D2 subframe no problem. I presume thats what MRC did when they put one in a B5.
That conversion piece for the prop I linked to earlier does not look 128mm long so probably won't work for us. I may email the seller and ask though. Could be we could get a custom batch made up for us if a few people are in. It might work for an 0A3 though, which would be ironic
