GM / General Motors: Caddy brake line flairing tool

I'm replacing the rear brake lines on a 93 Seville. I'm trying to
locate the correct flairing tool to produce the flare shown in the
manual. The manual states not to use single or double flares but to
use an ISO flare produced with to 29803-A. The flare has more of a
diamond shape that a standard bubble flare. Does anyone know where I
could obtain this tool or recommend an alternative? Thanks

In article <agapb.72219$southeast.rr.com>,
"Eightupman" <com> wrote:
 

Often times, the correct length is not available, even if one
mixes different lengths. (I hate 'loops' that take up slack)
There are also times where the threaded fitting (nut)is a
different size from what comes on the replacement line and there
isn't enough room to fit an adaptor, this necessitates cutting
the old line, salvaging the old fitting, cutting the new line,
installing the old fitting and re-flaring.

In the case of my 91 Seville, there was no way I ws going to fish
new brake line all the way up to the ABS controller considering
what a mess and tangle all the plumbing is in the LF corner of
the car, since only the rear sections of line were vulnerable to
rust and rot, it was much easier with less risk to cut the lines
forward of the rot where they were still nice and clean, re-flare
the old line where cut and install a union, then hang the new
parts store line.