I have a Lotus Headless bass, very nice model. I think mine is a Korean model, it has a thicker neck then my Cort Headless basses which makes it better in my opinion since the Cort's seem to have a small problem with larger strings... Just cant get a perfect straight neck with large string on those Corts...
The only drawback, no Steinberger tuning system on the Lotus.
I have seen Japan and Korean made Lotus instruments... not certain about Mats made ones but you never know, hell we have Hondo Mat made instruments.... I am pretty certain that Lotus is a U.S. White label brand that might have instrument coming from lots of places... Best would be to try before you buy! if you are in a position to do so, all the power to you.
P.