They did reissue Ultra Magnus in his Diaclone colours as a ToyFes 2001 exclusive figure. Although the reissue doesn't come with
Powered Buggy (which has never been included in any version of Ultra Magnus).
http://www.tfu.info/2001/Autobot/Ult...ltramagnus.htm
Powered Convoy originally retailed for 3800JPY ($45) and the reissue originally sold for 5000JPY ($60). You probably won't find those toys for those prices now (and I'm not suggesting that you can) - but considering that Powered Convoy has been out of production for approx 29 years and the reissue was a limited exclusive, it's not surprising if these things are now hard to find and fetching high prices on the aftermarket.