Well, you don't need to get a D44 or 60 just because you broke one axle. You didn't say what you have now, other than a D30. What year is your rig, do you have a disconnect or non-disconnect housing, and are you running 260x axle u-joints or 297/760x u-joints, and what tire size?
If you have 260x joints, you can get replacement Spicer axles that use the larger 760x joint, which is a good upgrade. The 760x joint is stronger if it is held in using snap rings (full circle clips) rather than the c-clips that they come with. To do this you need to grind away a small part of the straight ridge that's inside the ears of the Spicer axles, so there's room for the snap rings. You can also put a few tack welds on the outside of the cups to the ears, which does the same thing, but the snap rings should let the u-joint last longer if that's an issue. Beyond that, you can install chromemoly axles with either 760x joints, or
Longfield joints, or
CTM joints. In order of strength......260x, 760x, snap ringed 760x, cryo treated 760x (snap ringed), Longfield Super joints, CTM's (I didn't include the OX joint because it hasn't been out long enough to have a track record).
For stronger axles, you can use a Warn or Superior chromo inner axle and a Spicer outer, or Superior chromo inner and outers, or Warn chromo inner and outers, but you need a Warn hub kit to run their chromo outers. If you run both inner and outer chromo axles you can run CTM's. I don't know how much money you want to spend, your tire size or ultimate goals, but that's what's available.
BTW, it is
STRONGLY recommended that you DO NOT drive on a broken front axle when the joint has broken. The broken ears of the axle yokes can bind against each other when you turn and can force the knuckle off the ball joints or even break the knuckle around the ball joints. I've seen this happen numerous times on the trail, and it's not pretty. If a broken rig must pull forward, someone should watch the axle yokes while the rig is carefully moved so no more serious damage occurs. Consider yourself lucky that you made it off the trail and the 30 miles home.