Kuniji Ikeda has found a way to get V9958 as well as Y8950 chips. However, to keep the chips affordable, he should order quite large amounts at a time.
The V9958 is the VDP of MSX2+ and MSX turboR computers. It is needed to convert an MSX2 to an MSX2+. The chip unleashes SCREEN 10 t/m 12 and diagonal scrolling mode. The Y8950 is the legendary MSX-Audio chip set as featured in e.g. the Philips Music module.
If you'd like to order chips, please contact Ikeda at brb35357@nifty.ne.jp. Estimated prices are US$ 18,96 per V9958 and US$ 21,96 per Y8950.