Can you supply paint that matches a Munsell notation?

No. This service used to be available from Munsell for the American market but has been discontinued.

Is it possible to have only 1 sheet of a non-standard sheet of colour and not a pack of 10?

No, sorry but the minimum quantity produced is 10 sheets which have to be purchased by the customer requesting this special colour.

Why can't I find the Sol-Souce Lamp in your shop?

Since the take-over of Gretag Macbeth by X-Rite the Sol-Source has become discontinued.