Where do I get parts for my old 100e mk2 welder I need a complete torch set-up

Lots of torches are fairly universal and you are likely to find it cheaper to replace only the parts needed if you can find them - manufacturers tend to prefer to sell the torch (or gun) complete with the hose, cables and sheath and they are expensive though considerable savings can be made dealing with factors or independent supplier/repairers.

Most professional mig welders over here use the euro torch and when a welder doesn't have one and the torch is ready for replacing it is a worthwhile modification, especially if the necessary parts can be sourced secondhand or salvaged.
The euro torch just plugs into the machine and once the machine has been modified there are plenty of usable secondhand ones about that can be had for a song.

If you aren't conversant with the euro torch, try a search...

Hi:
It's redundant if the wire is fluxcore, gas does not help here. BUT if you use a DUALSHIELD wire then the quality of the welds are outstanding, even if you use pure CO2 gas.
Best Dualshield wire out there is ESAB's 710X and it is not expensive.
Have a great weekend.

Substitute your clark tips for Tweco ones, which are available at all welding stores. Find your nearest Praxair location in the website www.praxair.com.
Part number os TWE 11-30 or TWE 11-35 depending on the size of your wire .030 or .035.

Hi:
Follow this link for clarke models pro-90, 100E and 150TE MIG,

http://www.mig-welding.co.uk/forum/files/clarke.pdf

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Follow This link and you can order them on-line.

http://www.weldingdepot.com/clarke_mig_welders.html

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Have you change the gun liner? Change if you haven't done it in the past year.

Check the tip,make sure there are no kinks in feed line and open the lid and check the tensioner.there should be a screw to adjust it.

Your gas hose or torch could be bad or plugged. Your gas solenoid on the welder itself could be bad. Disconnect the torch gas hose at the welder and see if you have gas coming out of the welder itself.

Call HTP America at 1-800-872-9353 or go to their E-bay store - usaweld - they have many Clarke parts.