If the gear lever is sloppy in gear then its probably as you say due to all the little bushes and unions on the gear linkage being worn.
Also sometimes the little ball at the bottom of the gear lever needs replacing but this normally shows itself by you getting reverse without having to push the lever down.
Whilst your at it get a weighted shift rod, the one from the caddy/MK3 golf is the one to use and it improves gear changes no end.
Part no: 1HO 711 183