Motorbike / Car Shops In Thailand ?

Hi, i am wondering if anyone here can help me.

I have lived in Thailand off and on for about 1 and a half years now . I now have a product to do with the auto Car / Moterbike industry that i am trying to sell in Thailand. It is a commercial retail product that could easly be sold in shops to custmers so i am looking for big stores or small stores that have shops all over Thailand. So far the only chain stores i can find are Lotus Tesco's and Big C. They do sell some products for Cars and Moterbikes ( which is the market i am looking for ).

But is there any Chain stores that have shops over Thailand just to do with the Car or Motorbike products ? I am from the UK and there we have shops called Halfrods that are all over the UK just for this market. Is there any shops like this in Thailand ?

Can anyone tell me, any infomation you have would be a great help. thanks

P.S to the moderaters i am new to this fourm and i posted this in another topic before i seen this one. But i need it in this topic. Sorry if i have posted it 2 times