One also quick question, why does these walls are called steck , does anyone know ??
The brown wall toasts should still be available as they are part of the Steck houses in the DS catalogue. However, the part number you quote is an old one as they are all 8 digit now. Where you have a 7 digit number you should add a 0, zero, to the end.
... i estimate i need about 400 pieces ....
In Playmobil's catalog aren't they referred to as "Click System" Rasputin "The Mad Monk"
Don't forget when ordering that the toast come on sprues, in eights, so don't order 400, order 50.I got caught out ordering the cleats for pirate ships, and ended up with a huge number of spare cleats.