Tire Selection Ferrari 22-3W Compact Tractor Turf Tyre Replacment?

[ajy]

Hi,

I have a 22-3W compact and looking for a set of new tyres which I am struggling to find, on it now is;

Fronts are 6.5/80-12 and they are a turf style
Rears are 10.0/75-15, the closest i can find is a 10.0/75-15.3 would this fit?

I can only find a agricultural style tyre for front and the rear is that style as well.
Any help would be much appreciated as pretty confused with all this and unsure if I could fit a different width of tyre?

AJY