I thought there might be one in the Roman theme, but I haven't access to my collection at the moment. Of course you'd lose the red bit from the bottom of his cross, which would be a shame.
An alternative might be to keep the gold legs, and add gold arms, coif and neckpiece from the Unicorn Knight (in the Target blister packs among other sources) to create a gold crusader.
The great helmet hasn't come out in gold yet, but it probably will one day. We're also stuck with the silver shield. Ho, hum, I'd like Playmobil to explain why they went with gold legs, it might make me dislike them less.