I contacted Boston about a replacement part and was told they no longer carry this item.

I did remove the cloth material and it revealed a very nice wood finish on all sides. I am in the process of staining the wood tops on these and will finish it off in polyurethane. I may leave the plastic covers off. I may stay with this look. The only thing I would like is an optional speaker cover.
Anyone have any ideas on building a cover for the speakers?