Further to my search for V-Rubber tyres in Thailand, the first response to my inquiries was the 2 favourite words in Thai retailing - mai mee or literally no have. This could mean I do not know and am too lazy to find out, do not know and do not want to look stupid and lose face so it is easier to say mai mee, phoned the wharehouse and got mai mee so either of the foregoing is possible, could not be bothered dealing with the foreigner, on backorder, or quite possibly really not available.
After weeks of asking, it turns out that the front is the VRM-191 pattern is available at 2500 B or 83.00 USD, but the rear in the same design is mai mee. When pressed that the rear is a new size per their website, and she should really recheck, the excuse it that the website is wrong.
This could mean mai mee (as defined above) or a face saving excercise.
I give up and will have to import some performance tyres.
I really do not feel so bad as my friends here tell me that V-Rubber tyres are cheap in the true English meaning of the word.