Modern and "nice" type of a "mnaged Firewall order form"

Hi,

i have a question that is not very technical, i hope it is ok for this category.

I'm designing a new managed firewall service for our customers. Most MSSPs provide an Excel sheet to their Customers to collect strucktured Change requests.

I'd like to avoid M$'s overdosed Calaulaor and create a more comfortable tool.

How have you (MSSPs) solved this?
Webtool? PDF Form? Funky App?