Better way to manage Members Areas Coupon Codes

Hello all!  I have a client using Squarespace's Member Areas to store and sell
educational video content. We're now starting to work with university
bookstores to sell semester-long memberships to the different member areas.
The bookstores want us to sell them coupon codes which they can then, in
turn, sell to students for a set price. The student enters in their
purchased coupon code upon registration, which in turn provides them with 4
months access to the member area and educational content.

Currently, we can create unique coupon codes within Squarespace for this,
but I have to manually create and set parameters for each individual coupon
code, which is wildly time consuming when we've got an order for 50 codes.
(I have to name each code, type in the unique code, set the start and end
dates, specify that it can only be used once, that it can be used for
member areas, etc.) It's also not easy to view all of the different coupon
codes -- Squarespace has it set up like a list that you have to scroll
through in a side bar, I haven't found a way to view them all on a more
spreadsheet type of list, which makes it difficult to check on the status
of different codes (if they've been used already, etc).

Can anyone think of a better way to create & manage these codes?