Dave is showing the Idlers for a Jagdpanther (Taigen) as out of stock these are on the same page as the "Henntek" Adjuster, If you go to ----
www.rctank.de
they are selling the Taigen Idlers as a set with sprockets, All metal with bearings for 24.95 Euros,
Be aware that Dom at rc tank will include VAT at 19% unless you clearly tell him you are not liable because you are in the USA.
I have not checked if Erik at IMEX has them in his Store in Florida it might be worth while talking with him.
Shaun.