Offer Lifetime Supporter Subscription along with other current options.

I would like to, for a limited time, offer a Liftetime Supporter subscription for a small percentage above what is charged for a 12 month subscription. I have went through the forums and have found people looking to offer the lifetime as opposed to the 12 months and I have also found those who wanted to manually change the length of the Supporter Expiration date. I am looking to offer the 1 month, 3 months, 12 months, and lifetime? Is this possible? What would need to be done to offer this? I would want to be able to offer it but also be able to remove the option fairly easily. Thanks for all the help.

- Justin