And do you still beat your wife?
Up late bored and drinking? I don't trust products from China, which have been shown to contain lead, but what is your paranoia about the century we are living in now?
Pinball machines may be considered commercial equipment by the industry, but the US regs defined them as consumer goods, and were covered by the ban -
§1303.1 Scope and application.
(2)(b) This ban applies to the products in the categories described in paragraph (a) of this section that are manufactured after February 27, 1978, and which are “consumer products” as that term is defined in section 3(a)(1) of the Consumer Product Safety Act. Accordingly, those of the products described above that are customarily produced or distributed for sale to or for use, consumption, or enjoyment of consumers in or around a household, in schools, in recreation, or otherwise are covered by the regulation.
Stern incorporated in 1999 and had purchased Sega which had operated since '95. Although I don't have first hand knowledge, it would have been illegal for them to use lead at any point. I don't think there have been reports of lead in Sterns, so what are you in search of here?