I have been trying to locate HO long passenger turnbuckles such as Custom Finishing's #166, (Walters #247-166) for over two years. I am in need of 20 packs. If anyone would know where they might be available, I would appreciate the information. Happy modeling.
Check this out, listed for freight cars, but look very close. Give Don Tichy a call, he is very friendly and will help you find what you need.
http://www.tichytraingroup.com/index.php?page=view_product.php&id=195&category=Freight+Car+Parts
Another source that has Detail Associates, Details West and others. In the HO section, scroll down to "detail parts"....They have Custom Finishing parts, but not the item you want.
http://www.discounttrainsonline.com
Good luck
Bob