Software Upgraded - Reset Your Password to Login
In order to log in after the forum software change, you need to reset your password. If you don't have access to the email address you used to register your GVR4.org account, you won't be able to reset your password. In that case, follow the instructions here to regain access to the forum.
It is weird how it doesn't come up in ASA as for applicable models, but is a valid part number. Though it has a IPB pointing to a control unit for alarm and timer. However on Mitsubishiparts.net it's still available, but it will cost $200 after tax and shipping and take couple weeks to probably get.