Are MRT still in business?

[bedsrcmcc]

Not sure if this is the right place to put this message, but I was wondering if anyone knows if Model Racing Technology who make the MRT Personal Transponders are still in business?

I have been trying to conatct them for the past 4 days and no one is bothering to reply to my emails or phone calls and considering I want to buy 20 of the Transponders you'd think they'd reply to me!!!!

Does anyone know anywhere that stocks lots of these so I can buy in bulk?

Thanks in advance...