All scales over at least 2 octaves (major, both forms of minor, arpeggios, for each plus dominant and diminished chords is a good basis for technique , with at least two good alternate fingerings for each. You could try writing out your own and have someone check them. I have just bought Levinson's book, School of Agility (Carl Fischer) for $US26.95and haven't had time to delve into it deeply and think it would take you further.
My short list of suggestions, all relatively inexpensive and readily available, are
Simandl Tutor, Book 1 (IMC or Carl Fischer), to finish working through for secure knowledge of the fingerboard up to basic thumb position, Tedious but necessary.
Simandl 30 etudes (IMC), to work on tone and projection with the bow
Wohlfahrt, 24 studies, for eye training practice and consolidation of lower positions
Lee, 12 studies (IMC), for legato and slurred bowing development
Hrabe 86 Etudes, Book 1 (IMC), for technical exercises up to thumb position
Slama 66 studies in all keys (IMC), for more exercises in major and minor keys that are both technical and musical.
Sturm 110 exercises, Book 1 (IMC) that are both technical and musical, and ask for dynamics and phrasing. These are about at the level of a lot of orchestral passages (except Richard Strauss and a few others!!!!!!!)
Buy your own copy of Simandl Tutor Book 1. Then Wohlfahrt, Simandl etudes and Hrabe if you feel like some more bow and reading work. Or jump to Levinson, worked through in parallel with Lee and Sturm. After the Eccles a fun piece in ragtime by Hester, "The Bull Steps Out" and the Capuzzi Concerto (in F). Be patient before taking on the big concertos.
Best wishes,
DP