[SGMAlice]

40k tanks are based on 1/35th scale and 40k figures are based on 1/58th scale.
So look around for that size.
you may even get away with 1/48th as well.
As for where or what: i don't know.

For your viewing pleasure: 2 Cadians Next to a 1/48th scale

SGMAlice

 

[SGMAlice]

40k vehicles and figures have no scale at all, they are all random.

I did say 'Based on'. Which they are.

SGMAlice

 

[SGMAlice]

This article on Dakka is where i 'based' my assumption of the 1/35 scale

http://www.dakkadakka.com/wiki/en/Scale_Model_Kits_for_40K

Might see if i can find an old T35! Good for a SuperHeavy

SGMAlice