If you can run foams them there no point even considering rubber tyres as is easier to get hold of F103 foams than rubber tyres that will work.
My base setup for F103 on carpet is 30 shore rears with 37 shore fronts, with 35 and 40 shore fronts for tuning. Tamiya don't list shore ratings, their 53129 HBR soft rear and 84096 HBR medium front are a good combination. Try any of the usual F1 specialists,
RacecraftRC,
The Border, or
RC Mart