Hi, I have the Jebao DP-4 and the salve and I had issues with the heads creating air in my tubes. I bought replacement heads from two different dealers on eBay. However they both came with these valves. One of the sellers had the regular valves that the jebao came with, but the heads came with those smaller valves. I tried to use both silicone and air tubes with those heads and it doesn't work properly. Where can I buy jebao replacement heads that aren't $20 each?

