I'm not aware of such a card. The highest density you can put in a single slot is, I believe, via the ML100T-12 12 port Ethernet card. For higher desnity neds, you may want to aggregate your feeds outboard of the 15454 and then feed it via Gigabit Ethernet or SONET interfaces.
Here is a link to all of the 15400 series data sheets:
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...