I'm really looking for an SL6506 tweeter for my Polk RT800i. I'm having trouble finding it, though. Polk customer service has recommended a replacement but it's for the RTixxx series so it won't match the Tri Lam in the other working speaker(I don't want to have to pay $190 for two tweeters). So I found these on Ebay at $40/pair. Would they work? I'm not worried them sounding the same as the Tri Lams as these speakers will be used for surround duty. I'm thinking that these were used in the previous RT generation speakers, the RT35's but 100% sure.