Retractable, powered wheels?

[Perry Apsis]

I can't imagine nobody has made these but I've searched a truly unhealthy amount and couldn't find them. I'm working on a design that requires the ship to lower itself down onto a ground-mounted docking port. I can do it with small gear bays and a couple of radial engines, but it's a bit hard and a little wasteful of fuel. I can do it with landing gear and just maneuvering extremely carefully but it's VERY hard and rather wasteful of fuel.

Can someone please point me to some wheels that can propel the vehicle as well as retract?

TIA!

[Hodo]

B9 has them.

[Deathsoul097]

Firespitter has them too.

[Perry Apsis]

Thanks. I've downloaded both B9 and Firespitter (been meaning to check out both for some time now anyway--ironically, if I had not been on this quest to find the right wheel, that would have been the next thing I did).

[Tex]

I love your name, BTW.