As mine's a needle feed I don't have much choice, I was planning on getting this which looks about as wide as yours. https://www.trojansewing.co.uk/product/adj-binder-presser-foot-needle-feed/
I might go for the real Suisei foot then, looks a bit better: https://majmasz.pl/pl/p/Oprzyrzadowanie-SUISEI-nr-kat.-SAN55-stopka-standardowa-ruchoma-do-lamownika-do-maszyny-z-kroczaca-igla-Hinged-Binding-Foot-for-Needle-Feed-Machine/76784
I think you can get on of the SAxx (e.g. SA45 or SA130) feet which are easier to get by, I believe the number is specific for each tape width. The foot for a finished width of 13mm looks about as wide as the one you have though.
https://www.college-sewing.co.uk/folders-attachments/suisei-folders-attachments/suisei-presser-feet/suisei-binding-feet.html
This has been incredibly helpful, thank you. Will report back!
@margot_skidder started
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As mine's a needle feed I don't have much choice, I was planning on getting this which looks about as wide as yours. https://www.trojansewing.co.uk/product/adj-binder-presser-foot-needle-feed/
I might go for the real Suisei foot then, looks a bit better: https://majmasz.pl/pl/p/Oprzyrzadowanie-SUISEI-nr-kat.-SAN55-stopka-standardowa-ruchoma-do-lamownika-do-maszyny-z-kroczaca-igla-Hinged-Binding-Foot-for-Needle-Feed-Machine/76784
I think you can get on of the SAxx (e.g. SA45 or SA130) feet which are easier to get by, I believe the number is specific for each tape width. The foot for a finished width of 13mm looks about as wide as the one you have though.
https://www.college-sewing.co.uk/folders-attachments/suisei-folders-attachments/suisei-presser-feet/suisei-binding-feet.html