Hi Paul,
I bought mine through Bakers Industrial who I am sure will mail order. Product number 00681753. I was able to buy individual 50 ml dual syringe packs at about $ 27.50 ea. The 50 ml packs are great because you can meter out and mix small quantities. I went through about 8 packs. You don't need the applicator nozzle or gun, just insert two pieces of tube about 100mm long into the syringe pack and meter out onto an old margarine tub lid, and mix. Apply with a small spatular or similar.
Ducky