The bulb went out on my 98 3.2 TL.

Can anyone give me some guidance on how to change the light bulb on the dashboard that tells me what gear I'm in? All the other bulbs work ( P, R, N, ,D3, D2, D1) But the D4, normal drive light has gone out for some reason.

Where (besides the dealership) can I get this bulb from?

Thanks!