WLAN AP router and private Class-B IP addresses

Which 802.11g WLAN AP router support private Class-B IP addresses like

172.16.0.0/12 on the LAN and wireless ports, including admin port, DHCP etc?

To my astonishment the Linksys WRT54G which I bought as a replacement for my broken AP forces to use Class-C addresses 192.168.0.0 only. I had to return it due this silly limitation which my old AP, a Global Sun Technology clone, did not have.

Since I use VPN to access our corporate LAN from home my IP addresses must be taken from the Class-B address range. Also, I do not want to change dozens of IP addresses only because the AP forces me to.

Achim