Are all ready-made wheels sold "cassette compatible" only? I will have to change my wheels on my old trusty late-80s Peugeot (PS28) soon. The rear wheel is mounted with a freewheel-type 6-speed hub (not cassette).

I was wondering if all ready-made wheels that you can buy are only cassette compatible (therefore 7-8-9 speeds)?

My derailleur is Shimano 105 with mixed friction/indexed mode, mounted on the tube, I suppose it is only designed to support an indexed 6 speed.

A LBS told me I could only change the rim of the wheel given the hub is in good condition.

What would you suggest would be the best way to approach this?
If your hub is in good condition &amp; you wish to keep it having the wheel rebuilt is the way to go. However if your shop is trying to charge you more then 100$ish dollars for a rebuild, especially on an older hub perhaps consider doing the rebuild yourself. Re/building wheels is not a particularly difficult task with a wheel stand &amp; proper tools all of which are readily available online for reasonable prices. However it can be exceedingly time consuming so consider this aspect as well the reality is that it most likely would take you shop just as long to rebuild the wheel but some times it's more easy to just pay someone.