Well unfortunately VPN Concentrators are End Of Sale. You would have to go for a ASA box. Part code: ASA5510-BUN-K9 which would provide you with "Cisco ASA 5510 Firewall Edition includes 3 Fast Ethernet interfaces, 250 IPsec VPN peers, 2 SSL VPN peers, 3DES/AES license"
For more options visit http://www.cisco.com/en/US/products/ps6120/products_data_sheet0900aecd802930c5.html
For SSL VPN and more VPN options use this webpage
http://www.cisco.com/en/US/products/ps6120/products_data_sheet0900aecd80402e3f.html
As far as your Cisco Access points 1200 series is good place to start check the datasheets.
HTH
Hoogen
Do rate if this post helps :)