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I've not found any site that has the production numbers broken out to the specific level of detail that you are asking for. I referenced the following site:
There were 300 23U Bright Blue Convertibles made in 1998 of 31084 total C5's and 11849 Covertibles total.
There were 2308 Light Oak Tops (20.8%)
There were 2720 Light Oak interiors (24.5%)
There were 2650 MN6 Manuals (23.9%)
So if we assume that the above percentages applied across all colors equally you can imply that of the 300 that 62.4 had light oak tops, 73.5 had the light oak interiors and 71.7 had the manual transmissions.