What compatible single wall filters are there, for the Sunbeam Piccolo Espresso?

[Eotane]

I currently own a Sunbeam Piccolo Espresso commercial link removed per site posting policy

I am looking to upgrade the dual wall filter to a single wall filter, but I'm not sure what the various sizes of baskets that are listed online, measure. (Inside or outside of filter etc.)

I've posted some pictures of the measurements of my current double shot, dual wall filter. (The two of the outside of the filter are measuring the diameter from the top and middle.)

Pictures here: filter basket measurements - Imgur

Does anyone know of any single wall baskets that would be compatible with my current group handle?

Thanks,

p.s. I don't want to modify my current filter basket.