Don't know if they make an SSY car now,but a company called Baluard made a variety of resin cars,engines,and rail related stuff in 1/35. Only place I've seen list them is Firestorm Models in OZ.
HTH
cheers for giant dios!

Just to throw this out there:

One of our LHS' has a set of Model Kasten Tiger transport tracks on sale for 50% off....$19.98 (instead of $39.99). I looked at the set today out of curiosity.....pretty darn nice. So, check your LHS....ours are marking down a lot of the AM stuff; yours may be too.

Mike

For Baluard stuff:

www.baluardmodels.com (Spain)
www.redlancers.com (US) check under 'miniatures'

www.missionmodels.com (US) carries a Hansa Systems rail road switch tower under 'diorama accessories'

I just finished building the Azimut/Ironside boxcar om breslau that Richard (DogEgg) was talking about. Vague instructions, nice detail. Comes out pretty nice with time and patience. Ended up puting a curved roof on mine without too much work. I recommend these if you can get your hands on one.
If you're looking to put a Tiger on a flatbed, as I understand it the heavier rail cars like the SSY were used.

there are many places to get 1/35 scale trains azimut/ironside web suite and someone said baluardmodels.com also Matador models at scalelink.com and someone said atelier-infinite.com and as before azimut productions.com note:the 1/35 scale german box cars are no longer being ship with decals as i found out when i brought 15 box car kits and they told me to bad(people at Azimut productions) seems to me that they need to remove this off the parts listed on the box anyway hope this helps any problems finding these kits i will sell some see ya Brock