Well, if you have a welder, you are off to a good start. If you don't already have these, get them:
Angle grinder - get at least 1 good one. You'll use this tool SOOO much.
Good corded 1/2" Drill - Again don't get a cheap one, a nice one will last you years and years
Drill bits - Either go with a nice set of Black Oxide ones or Cobalt.
Jig Saw w/ metal blades
With these tools you can fab most things.
Use cardboard cut outs to mock up your pieces. If you want something more rigid, and if you have access to it, use scrap sheet metal or aluminum.
As far as ideas for the bumper:
Use Tube - sure they may not look as cool as some of the plate ones, but they are easy to build and super strong. I would go with a 2" x 5" or 2" x 6" with 1/8"-1/4" Wall
Through Tube Shackle Tabs - don't be lazy and weld your shackle tabs to the front surface of your bumper. Any lateral load on the tab will pull it off. Cut a hole through your tube on both sides and weld that sucker in so it won't go anywhere.
Tie in brackets - Don't only mount your bumper to the stock mounting location. Go all the way back and grab the bolts for the steering box. The JCR tie-in plates as mentioned above by Green4dr are perfect
Here are some drawings of my winch bumper
The large green piece is the stock front crossmember. You can see how many bolts hold it in place to the uniframe
The smaller green pieces help protect the the uniframe from crushing by spreading the load out
Here is a shot of almost
what it turned out to be
Here it is finished and in use. I added a small hoop (wish I had made it bigger to I could actually see it from inside...)
I can't afford a winch yet, so I use it as a place to hold...stuff