>1.25" is very close.  1.25" copper just fits over the stock metal lines.
You can still get the metal lines.  Why bother trying to rig something?

In the States, maybe. The T3 was never sold here... pipes'd have to
come from Singapore & if none there, from Germany... at a huge cost.
--
Andrew Grebneff
165 Evans St, Dunedin 9001, New Zealand
<andrew.grebneff@stonebow.otago.ac.nz>
Seashell, Macintosh, VW/Toyota van nut