Cheap genuine ones on fleabay, GSS342 should plug straight in but use your old filter sock as the angle can be wrong on the new ones.

http://cgi.ebay.com.au/Walbro-GSS342...item27b5899dbb

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Beaten up old 98 Gen 2 Liberty, 13.0, stock V3 STI running gear.
07 Transit motor home
69 VF & 70 VG Valiants needing full restoration
Yamaha Zooma 50cc rocket hopefully going with the Transit.