Yup that it is, doesn’t help we don’t have a post code either here in Botswana so that tends to limit options further, but if one is stubborn enough there’s usually a way.
Here’s a link for a similar one, slightly lower power but same physical spec.
600W is 2’000-13’000 rpm this one is 500W with 3’000-12’000 rpm, the spindle itself weights around 1kg
As for collets are they all the same outer size, just the aperture for the bit varies? for example if I could source a 1/8" ER11 collet like the one used on the spindles would I be able to just swap it out with the Ryobi 1/4" collet? provided the retaining nut is removable