Manfrotto Mf165 Tristativ-stabilisator

This works pretty well on my 546 series tripod. The mid-level spreader is totally unusable on the 546 tripod, so this is your only real choice. It's not bad, not expensive, I can live with it. Can't expect much more for the money.

this replacement was better than the set that came with my tripod. good price too,

these are better than the ones they replaced. Great design, durable and well priced.

I wish it wasn't plastic but it gets the job done and it was a cheap solution.