Extended grip for 5N?

Hi All,

Have had 5N for 2 weeks now (picked up a bargain in the run out of 5N stock) and have found the grip to be really short, knew it before purchase but i guess in my flurry of playing with it I have found I need something that could provider a longer or chunkier grip.

I have tried different ways of gripping and can only ever fit two fingers around the grip, which doesn't feel very solid as I have LA-EA2 and Alpha lens at the end of it

I have not found any aftermarket accessories that could do this, anyone know of any pre-made or home-made contraption that can help?

If none is in existence I might make it a home project to build and manufacture small quantity.