Is it this company?http://www.colder.com/Tabid/72/MaterialID/1/cID/1/Products.aspx
I found them, there are a couple of companies selling them but no cheaper than ADDarran
Microbore hose and pole hose are both 6mm (1/4inch) if your using mini bore that's 8mm (5/16)I have returned to rectus 21 - the connector I tested started playing up after 7 weeks by constantly disconnecting same really as it was really working great until thenDarran