welcome to the shop Jimmy - I've never heard of a 2 speed front for a 4x4, and keep in mind that the front and rear differential ratios need to be nearly identical to work .... the only way I'd think you could do it would be to find a 1T or larger 4x and swap the whole drive line in - early 4x conversions were done on big trucks for the military [scarce and more likely 6x6] or you might find a newer 4x to work with - OTOH, a 2T 4x won't be much use except for climbing walls

Bill