I went with 7" halogen replacements that had H4 bulbs in my 46. They are available from several different suppliers. They just bolted in without any mods to the stock bucket. Be aware that halogens can be hard on wiring and dimmer switches due to higher current draw. I had to add a couple of relays behind the grill with a dedicated 30 amp supply from the battery to get my halogens to put out good light.

LED's are also available that will replace the 7" bulbs that you have now. They will draw less than halogens, but they usually have a large ballast and heat sink on the back that may not fit in the bucket without modification. I've looked at them, but never ran them.