Guys, help me out here if you can!

I'm looking for some pre-cut brass - smaller than typical from K&S or other suppliers.

I need some strips that are 0.020" thick and 0.050" wide - by almost any length.

I can't cut these myself from existing 0.020" stock.  Or at least I lack the technique to do it accurately.

I want to scratchbuild some ladders in brass as replacements on some older tenders and other brass rolling stock.

I got a chance to see Rio Grande Southern 20's rebuild progress, and discovered lots of cool equipment at Strasburg!

http://rgsrr.blogspot.com/2018/09/rgs-20-rebuild-progress-sep-2018.html

Having completed my first layout to as much as I intend to, I've been having a bit of a play. The track plan consists of a pair of 5-3-3 Inglenook yards:

Linked by a short runaround loop, which  due to space constraints can only take three wagons:

Does anyone know the history of Westwood passenger car kits?  I recently purchased one on E-bay and a date of 1969 is hand written on the instruction sheet.  I thought the kits came out in the 1970's.  Also does anyone have tips on assembling these kits?  I'm thinking scribed styrene could be used to replace the scribed wood that comes in the kit.  I have assembled their kit for a CP shorty business car over 30 years ago and it was a challenge to build with both plastic and wooden parts and no truly good adhesive at the time.

Robert