I've been using rubber cables for this upper body routine but an isometric belt or if You can make a homemade one could be used. Here's a link two how to make a suspension trainer which could give You an idea on how to make an isometric strap:

http://rosstraining.com/blog/2010/01/13/homemade-suspension-trainer/

http://rosstraining.com/blog/2010/07/26/homemade-suspension-trainer-part-ii/

Chest: 1) Chest Crush 2) Chest Fly Back: 1) One Arm Wide Lat Pulldown 2) One Arm Cable Row 3) One Arm Straight Arm Pulldown Shoulders: 1) Shoulder Press 2) Front Chest Pull 3) Side Laterals Arms: 1) Bicep Curl 2) Tricep Press Out 3) Pulldown Curl 4)Reverse Tricep Pushdown Forearms:

1) Reverse Wrist curls

2) Wrist Curls

Some notes for anyone interested. I'm going to try explain how I do the two chest exercises, the rest should be easy to figure out. I'm going to use a bath towel to make explaining the Chest crush easier. Roll the towel up long ways. Grab it palms facing down with hand spacing about 2 to 4 inches apart. Now all You do is cross Your hands like You're doing a front chest pose. Do both sides.

For the Chest Fly You need a loop in atleast one end of whatever You're using. Kneel with Your left leg out to the side. Put the loop around Your foot and grab the other hand with Your left hand. Now all You do is pull towards the Chest like the the DB exercise.

I'll leave the hold times up to You. This workout takes me 30 minutes top depending how long I hold each for. I'm only doing one position for each exercise. Also I do this workout Mon-Wed-Fri.