Replaceable bowl pipes

there is aWebsite co.uk called smokingmetal which may assist in identifying some of these pipes, especially those with metal shanks.
All buyers should be wary of buying any of this style of pipe unless the pipe is shown in it's geponent parts. Many offered for sale are so 'welded' together as to be useless or at very least require some expert attention to seperate and clean the parts. Unless you have that expertise or wish to teach yourself or are so desperate for an example of the pipe regardless of condition, be very careful. Many of us have encountered this problem the hard and expensive way, I have a box full of parts left when the rest of the pipe fell apart in my hands.
ThePipeMerchant has a guide to cleaning pipes which will prove useful