[sdiy] Looking for 45mm Alps slider with center detent

[Louis van Dompselaar]

I'm looking for a 10k Alps slider with a center detent to repair a Boss EQ.
Travel is about 45mm.  It is marked "10KW".  Not sure what the W stands
for, but it appears to be linear from measuring the other ones.

Picture:
http://www.dompselaar.org/10k_alps_pot.jpg

If anyone knows a source please let me know.  I'm in the EU, so most
of the large US online electronics stores are out (either too expensive
to ship or no delivery to the EU at all).

Louis