External asset upload - XML

Hello all,

i have a question regarding the asset manager and the webserver:
Rn I use a third-party XML file to show my products on my website (the XML comes from a marketplace where the data is located). This XML is hosted on the webserver and gets updated every few hours via FTP.
Now I am building a Webflow site and I am stuck with this XML file. There is no FTP access nor is there any other external possibility to upload this XML file (and update it regularly).

Can anybody help me with this issue? Maybe there is an third-party app for this?

Thank you very much,