I'm lookink for a 1/2 height sound card w/ game port 15-pin plug-in

[lilbigun58]

i have a 500L gateway system w/ a mini tower that's the one that can lay on its side or mount in a bracket to stand up-rite & a standard width sound card is too wide for tower.where do i find the one i need?it needs to be a 1/2 height sound card w/ 15-pin game port plug-in.