Well here's a long shot reply there is one on ebay.com for US$950 OBO, but there are two snags: 1) the module is located in a 4500II that the seller has not recognized and has listed as dichroic unit. 2) the unit is collect only in Minneapolis.
Still looking for one of these. Based on past sales here and on eBay I'm hoping to pay around $150 USD max. Also willing to include a dichroic filter module in trade.