...I know the DiTech-chassis - as I know the Parma Excaliber - and I did not mention these as they are NOT competitive!
Give the Schoeler a try - most of the german E-shops sell them. @ Swiss - my 1/24 Alcan-BRM is running on the bigger chassis which has them same principles - and whe I remember right, I showed you how to assemble the 1/32-chassis once
Plafit Super 32 - €41,41
Schoeler Puma Messing Chassis
24€ plus the cost for axles, wheels, ball bearings, motor, guide...
available at Jens Scaleracing
This is one of the best shops in Germany where you can get everything you need for scratchbuilding! Dieter jens speaks english and his shop descriptions are partially english - so give him a try!
The completely assembeled chassis with 4 ball bearings is 55€ - a lot of money but usefull if you've just 2 left hands and 10 thumbs
Buy the parts - it's much cheaper! And you will recieve one of the best chassis available!
What I forgot to mention is the Sakatsu
More or less the level of the old Plafit Mini - and is a RTR-chassis for 56€ - but sponge-tires and most of the times wheel sizes which don't fit the car.
Best would be to send Dieter a mail and to ask him what he suggests.