- Galaxies of the Arp Catalogue (Com) -

And (4) Cep (3) CVn (5) Lep (1) Peg (11) Tri (1)
Ari (3) Cet (1) Dra (1) LMi (4) Per (1) UMa (17)
Boo (1) Cnc (1) Gem (1) Lyn (2) Psc (5) UMi (1)
Cam (3) Com (3) Leo (10) Ori (1) Ser (2) Vir (6)

Arp 34 (GLXGRP)

../dss/dss2blue_124132.00_+260400.00_6_web.jpg
Image source: DSS II (blue) - 6×6'
Name: Arp34
Type: GLXGRP
Constellation: Com
Coordinates: 12h41m32.00s / +26°04'00.00"

Group Members:
NGC4613 15.2 mag 0.5x0.4'
NGC4614 (UGC7851) 13.3 mag 0.9x0.8'
NGC4615 (UGC7852) 13.1 mag 1.6x0.7' (125°)
8" f/6, 96x, Bortle 4
This observation was in May 2012 and I only focused on NGC4615, but without any success. I'm sure there should be more possible with 8 inch!
FAILED

Arp 159 (GLX)

../dss/dss2red_125145.72_+254627.90_5_web.jpg
Image source: DSS II (red) - 5×5'
Name: NGC4747, UGC8005, Arp159, H2.344
Type: GLX
Constellation: Com
Coordinates: 12h51m45.72s / +25°46'27.90"
Brightness / Size: 12.4 mag / 3.3x1.3'
8" f/6, 96x, Bortle 4
Tried at 37x, 96x & 133x.
FAILED

Arp 189 (GLX)

../dss/dss2blue_124342.63_+162336.23_5_web.jpg
Image source: DSS II (blue) - 5×5'
Name: NGC4651, UGC7901, Arp189, H2.12, Umbrella Galaxy
Type: GLX
Constellation: Com
Coordinates: 12h43m42.63s / +16°23'36.23"
Brightness / Size: 10.8 mag / 4.0x2.7'
8" f/6, 37x, Bortle 4-, NELM 5.8+, SQM-L 21.0
SQM-L 20.7: At 37x oval with much brighter center. At 80x very bright, slightly oval core area with much fainter outer regions.
EASY