Leading link forks, advice needed

So, I've got a set of leading link forks from ebay.

http://www.flickr.com/photos/8963323@N05/2409782962/

They look to be about the right size to fit on the front of a K100
(which I'm fitting a sidecar to).

However... the fork tubes are 34mm whereas the K100s are 41mm. Speaking
to the manufacturers they weren't really interested since every set are
different and they'd recommend I had a new set built (at over a
grand...)

So I seem to have three[1] options:

1. Make up two sleeves which runs between the yokes, OD 41mm, ID 34mm
and with a slot in them so they squeeze the forks when squeezed by the
yokes.
2. Get someone to make replacement tubes to the same pattern but in 41mm
tubing with the bottoms squished down to 34mm to fit in the 'swing arm'
piece. Get new clamps for the 41mm forks top suspension mount.
3. Get replacement yokes made to take 34mm forks



Looking at my three options

1. Seems to be the easy choice and probably not too difficult or
expensive. But it seems like a bodge.

2. Seems to be the most obvious way to approach it but...
- Will the tube be weakened by squeezing it to an oval profile?
- Any ideas where I could get this kind of fabrication done in the
south-west?

3. Seems to be relatively straightforward but again I've never had
custom stuff like this made (but I suspect it just involves throwing
money and a set of yokes at someone)


What's the option least likely to result in me riding an outfit and th
front end falling off?





[1] Get some fucking sense and don't piss about with sidecars isn't the
advice I'm looking for...