Denon DHT500sd add on speaker

[sonysbest]

I've recently bought this system & you were all right it's pretty impressive for the price soo glad I found this forum before deciding on my upgrade cheers all. I would dearly like to get hold of the additional 6th speaker but everywhere I've tried so far they tell me now discontinued & not available. I know I could purchase a set of speakers & active sub & then use one of the front speakers as a rear but that seems expensive & wasteful to me as existing passive sub & 1 speaker surplus to reuirements. Does anyone know where I could still get hold of one of these or are they now the proverbial 'hens teeth'? All help gratefully appreciated. Paul