R-507A

Temp Pressure
-50 0.9
-48 1.7
-46 2.6
-44 3.5
-42 4.5
-40 5.5
-38 6.5
-36 7.6
-34 8.7
-32 9.9
-30 11.1
-28 12.4
-26 13.7
-24 15.0
-22 16.4
-20 17.8
-18 19.3
-16 20.9
-14 22.5
-12 24.1
-10 25.8
-8 27.6
-6 29.4
-4 31.3
-2 33.2
0 35.2
2 37.3
4 39.4
6 41.6
8 43.8
10 46.2
12 48.5
14 51.0
16 53.5
18 56.1
20 58.8
22 61.5
24 64.3
26 67.2
28 70.2
30 73.3
32 76.4
34 79.6
36 82.9
38 86.3
40 89.8
42 93.4
44 97.0
46 100.8
48 104.6
50 108.6
52 112.6
54 116.7
56 121.0
58 125.3
60 129.7
62 134.3
64 139.0
66 143.7
68 148.6
70 153.6
72 158.7
74 163.9
76 169.3
78 174.7
80 180.3
82 186.0
84 191.9
86 197.8
88 203.9
90 210.2
92 216.6
94 223.1
96 229.8
98 236.6
100 243.5
102 250.6
104 257.9
106 265.3
108 272.9
110 280.6
112 288.6
114 296.6
116 304.9
118 313.3
120 321.9
122 330.7
124 339.7
126 348.9
128 358.2
130 367.8
132 377.6
134 387.5
136 397.7
138 408.1
140 418.7
142 429.6
144 440.6
146 451.9
148 462.0
150 475.3

R-23

Temp Pressure
-40 88.2
-35 99.2
-30 111.1
-25 124.0
-20 137.7
-15 152.5
-10 168.3
-5 185.2
0 203.2
5 222.4
10 242.8
15 264.5
20 287.6
25 312.0
30 337.9
35 365.3
40 394.2
45 424.8
50 457.1
55 497.4
60 534.3
65 573.4
70 614.8

Too bad it doesn't go lower but you can pretty much guess :P