Re: Arg! I lost a fusable link :(
Most parts shops sell new fusible links. It just splices onto each end of the old wire just like to fuse holder you are thinking of using. I can't remember why, but it's not recommended to just use a normal fuse. Maybe because it's too hard to select the correct guage? I don't realy know. For a TEMPERARY fix, you could just splice a new piece of thinner (numericly higher) guage wire in there as a trail fix. Just make sure the cause for the link going in the first place is fixed before you bother doing anything.
'88 Sahara, 4.2, auto, 4.0 head swap (finally), no trac bars.