Creating matching print items from a provided wedding invitation design

Information for the business: Wedding stationery
Design details: I need a designer who will create additional print items from a wedding invitation design I will provide in illustrator format.

Say for example I will give you the attached design and the additional text required on the matching item, and you'd just need to create one of the following:

Matching RSVP card
Matching insert
Save the date card

Pretty simple artworking job, you'll just fire back a screenshot for approval and then once signed off an Illustrator file and print ready PDF with trim marks & outlined paths.

Please quote a fixed price for additional item - I have attached an invitation and insert example so you can see what a simple job this is. I also want a commitment to turnaround i.e. 48 hours
Ideas for the visual style: as per design
Extra notes:

Just to add that these will be provided in vector format so you can pull all the elements apart