WTB Sunrise IDE-RS232 combi cartridge

Hi, I'm looking for a Sunrise IDE-RS232 combi cartridge.
Since Sunrise doesn't have them in stock at this moment and doesn't know if and when a new batch will be produced, I wonder if maybe someone here has one for sale or trade.
If it's in good condition, I'm willing to pay the price of a new cartridge.
I also have some other soft- and hardware up for trade, just let me know if you have one and I'm sure we can make a deal
To be sure, this is what I'm looking for:

Hope someone can help :)