Montero and Pajero is almost same, and Pajero parts are easily available. However thinking 1998 i would suggest to stay away as Montero was never available in GCC market so it must be import from australia or uk (assuming) and hence after 13 years of life you might need some rare spare part (only from montero) which you wont find in this market and spend too much time and waiting in getting it shipped from ebay or amazon online.