Hi, TTSE,
As an electrician, you know how to use various pipes and clamps... If you still do not have original LNBF support bar, perhaps you could try
other shapes, like aluminum blinds track, or, aluminum shower curtain pipe, or, tubes from folded beach chair.
To find the focal spot, you can use a few small mirrors, size 1/4" or 1/2, even 1", attached to various places on the dish face with double-sided glue tape (use thin tape, as other, sponge-type and thick, will not guarantee that the mirror would represent the dish surface).
Set up your dish on a mast or stand, direct it towards the Sun, and search for reflections with a piece of cardboard, trying to get the reflections merge together in one spot, sized approximately 1". It will be possible with only one elevation (altitude) setting, so, you will need to adjust it on the bracket, probably in a few trials.
Once you get the spots merged, measure 2 lengths from the spot : one to the bottom to the dish, the other to the top.
If the bottom length will be, for example, 26", you could use a bar, say, 34" long - fasten it at 27-th inch under the dish, so there will be a piece 7" long sticking out of the dish behind it. This will give you good leverage for additional (10"- 12")bar, attached to the 2 plastic parallel ridges which reinforce your dish.
For Galaxy 19 received from Port Of Spain, azimuth is 255.4 degree, and elevation 47.3
Tomorrow, March 1, the Sun will be at this azimuth at time : 4.14 PM, its elevation will be 28.7 at this time.
Your Sun outage will be March 15, at 3.00 PM, and March 16, at 2.55 PM (the Sun's elevation will be 47.0 and 48.3).
Cheers, polgyver