MagRacing is producing some great Classic Buildings from thin mdf , just under 1/8th ".
So far there are 4 buildings, Control tower, time keepers buildi g, Grandstands and Marshall Huts in a pair. All 60s era
I have built the Control Tower and Timekeepers building , they are really easy to assemble and look great and to scale.
Here is a link to,the site, and you can make a purchase on ebay, but they will deal direct at a better rate than ebay.
Here is the link , well worth the look
http://www.magneticracing.com/buildings/buildings.html
Bob