Replacement part for Spectrum 2-8-0 needed - any suggestions????

[mobilman44]

Hi!
  My HO Spectrum 2-8-0 threw a screw (attaches running gear to 3rd set of drive wheels) and I actually got a replacement two days ago. 

However, when I went to insert the screw I realized that the loco also "threw off" the small spacer.  That part is like a thick, small washer (3mm OD, 2mm ID, 1.5mm thick).  I "gerryrigged" a replacement out of delrin plastic, but I sure would like to get a metal one.  I checked with Micro Fasteners and Osorail (NWSL) and had no luck. 

Can you recommend any other micro fastener suppliers?

Thank you,
Mobilman44 

[full maxx]

just wondering if this is from an explorer set with a 2-8-0 consolidated steam engine

[Nigel]

small parts

http://www.smallparts.com/