Levinson, Barker - Koussevitzky & Tubin...?

I know that both Ed Barker and Eugene Levinson have played both the Koussevitzky & Tubin concertos with the BSO and NYP respectively, and I was wondering if recordings existed of these performances (and if there's a place I could find 'em). It'd be awesome.

Thanks in advance,
Stencil.