Hi guys,
I found a source for the original pouches and elastics from Trev Tomlin... if you go to
TREV TOMLIN*-*Trev Tomlin Replacement Cups/Pouches they are selling the original cloth TCO1P Pole King Cup pouches, these are fantastic (the pictures are the wrong way round on their website and it is the pouch that is pictured as TCO3P that you want but you need to order the TC01P to get the ones with the little spiggots for your elastic.
Great service too from Hopkins Holloway!