The best 1/6 Horses is still the Marx thunderbolt. There available on Ebay, reasonably priced. Some of you may recognise the 'pattern', the mold was re-usedby Toys Mccoy for their Arabian stallion. They have few issues. They are made from Styrene plastic, & hollow which males them very light.
They also have mold and join lines, this is not an issue a craft knife & a little wet & dry fine sand paper cant take care of. It Will give them a very nice matte finish that you can then paint to your requirements.
BTW Stevo makes metal shoes for these guys. He is genius with anything 1.6 and western
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<a href="https://s1100.photobucket.com/albums/g402/rebelpig/?action=view¤t=DSC01578.jpg" target="_blank"><img src="https://i1100.photobucket.com/albums/g402/rebelpig/DSC01578.jpg" border="0" alt="Photobucket"></a>
Painted
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As for saddles & Tack check out-
https://www.riorondo.com/
They do just about everything one might need.
Theres also-
https://www.benscustomtack.com/JWsaddles.htm
&
https://www.onesixthcavsaddles.com/id9.html
Unfortunately the guy (genius) who made the western saddle for my Indiana jones horse no longer works, infact he may have passed, shame HE was the best & a gentleman.