Swapping painted Sherman M4?

Hey,

It’s kinda unusual but here’s the thing:

I am planning to re-do my Sherman model. Before it gets upgraded I want to wash the paint off.
I thought maybe someone would be interested in exchanging painted model for clean piece?

Here’s the patient:

I am looking for heavier version of the tank – 76mm barrel.
Preferably with sand bags extra armour:

Thanks for your time 🙂