[Skunkworks] Cisco SFPs

Hi everyone, I need your assistance on this. I have a scenario. An ME 3400 Cisco catalyst switch (with 24 FE SFPs and 2 GE SFPs) should be connected to a Cisco 2811(with a HWIC GE optical installed). The issue is SFPs modules to be used since the switch is FE and the router is GE. Any ideas on the SFPs I can use?