I was looking for the same thing the last couple of days...
IDS-4235-K9 4235 Sensor(chassis, s/w, SSH, 10/100/1000BaseT w/ RJ-45) C $12,500
IDS-4250-TX-K9 4250 Sensor (chassis, s/w, SSH, 10/100/1000BaseT w/ RJ-45) C $25,000
IDS-4250-SX-K9 4250 Sensor (chassis, s/w, SSH, 1000BaseSX w/ SC connector) C $27,000
IDS-4250-SX-INT= 1000BaseSX Monitoring Interface w/ SC connector C $2,500
IDS-4250-XL-K9 IDS 4250 chassis, s/w, IDS Accelerated 1000BaseSX w/ MT-RJ C $40,000