New elbows for 3/16-inch tubing.  The actual O.D. of the elbow
is .218".  Two styles available: 90 degree bend and 135 degree bend.
$1 each, or $9 for 10, or $87.50 for 100, plus shipping.

Also available: cast iron elbows, one leg is 1-1/16", the other leg
is machined to 1".  $1.50 each, plus shipping.

Skip Downing

 [ 90 degree elbow
 [ http://www.mmdigest.com/Attachments/17/03/25/170325_043323_0324171642a.jpg 

 [ 135 degree elbow
 [ http://www.mmdigest.com/Attachments/17/03/25/170325_043323_0324171645a.jpg 

 [ 1 1/16" to 1" elbow
 [ http://www.mmdigest.com/Attachments/17/03/25/170325_043323_0324171639a.jpg